He has an 'impressive' vocabulary for a 10-year-old.
a large and 'impressive' [='imposing'] building
Her first performance was very 'impressive'.
(..) l'd like to present... - Count Almssy. - Hello. Geoffrey gave me your monograph and l wss reading up in the desert. - Very impressive. - Thank you. l wanted to meet the man who could write a long paper with so few adjectives. Well, a thing is still a thing no matter what you place in front of it. (..)1996 The English Patient